add code to bundle the whole application to fix the module loading error

Author: joshua1988

project/index.html

@@ -54,6 +54,6 @@ <h3 class="summary-title">Total Recovered</h3>
     </main>
     <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>
-    <script src="./built/app.js"></script>
+    <script src="./dist/app.js"></script>
   </body>
 </html>